Follow the steps to fill out the IN DoR IT-40 online.

1. Click ‘Get Form’ button to obtain the form and open it in the editor.
2. Begin by entering your social security number in the designated field. Ensure accuracy, as this number is critical for your tax processing.
3. Input your first and last name, along with your spouse’s information if filing jointly. Place an 'X' in the box if you are amending your return.
4. Fill out your present address, including the street number and name, city, state, and zip code.
5. If applicable, enter the foreign country code and the county code where you lived and worked on January 1, 2020.
6. Proceed to the income section. Enter your federal adjusted gross income, Indiana add-backs, and complete the subsequent calculations as outlined in the fields.
7. Ensure you enclose necessary schedules, such as Schedule 1, Schedule 2, and Schedule 3, as required by the form.
8. Continue through the remaining sections to input any taxable amounts, deductions, and credits, ensuring you complete Schedule 4 and Schedule 5 as necessary.
9. Finalize your calculations for any overpayment or amount due on the form.
10. Select your preferred method for refund or payment, including direct deposit details if applicable.
11. Review your entries thoroughly, correct any errors, and ensure all required schedules are documented.
12. Once completed, save changes, then download, print, or share the form as needed.

Start filling out the IN DoR IT-40 online today to ensure accurate and timely tax filing.